/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;


import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class BatchUpdateByPrimaryKeyElementGenerator extends
		AbstractXmlElementGenerator {

	public BatchUpdateByPrimaryKeyElementGenerator() {
		super();
	}

	@Override
	public void addElements(XmlElement parentElement) {
		XmlElement answer = new XmlElement("update"); //$NON-NLS-1$

		answer.addAttribute(new Attribute(
				"id", introspectedTable.getBatchUpdateByExampleStatementId())); //$NON-NLS-1$
		//answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
		//		introspectedTable.getBaseRecordType()));
		answer.addAttribute(new Attribute("parameterType", "java.util.List")); //$NON-NLS-1$

		context.getCommentGenerator().addComment(answer);

		StringBuilder sb = new StringBuilder();

		sb.append("update "); //$NON-NLS-1$
		sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
		answer.addElement(new TextElement(sb.toString()));

		XmlElement dynamicElement = new XmlElement("set"); //$NON-NLS-1$
		answer.addElement(dynamicElement);

		for (IntrospectedColumn introspectedColumn : introspectedTable.getNonPrimaryKeyColumns()) {
			XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
			sb.setLength(0);
			sb.append(introspectedColumn.getJavaProperty("record.")); //$NON-NLS-1$
			sb.append(" != null"); //$NON-NLS-1$
			isNotNullElement.addAttribute(new Attribute("test", sb.toString())); //$NON-NLS-1$
			dynamicElement.addElement(isNotNullElement);

			sb.setLength(0);
			sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
			sb.append(" = "); //$NON-NLS-1$
			sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn, "record.")); //$NON-NLS-1$
			sb.append(',');

			isNotNullElement.addElement(new TextElement(sb.toString()));
		}
		sb.setLength(0);
		sb.append(" where id in"); //$NON-NLS-1$
		answer.addElement(new TextElement(sb.toString()));
		XmlElement foreachElement = new XmlElement("foreach"); //$NON-NLS-1$
		foreachElement.addAttribute(new Attribute("collection", "ids"));
		foreachElement.addAttribute(new Attribute("index", "index"));
		foreachElement.addAttribute(new Attribute("item", "item"));
		foreachElement.addAttribute(new Attribute("open", "("));
		foreachElement.addAttribute(new Attribute("separator", ","));
		foreachElement.addAttribute(new Attribute("close", ")"));
		foreachElement.addElement(new TextElement("#{item}")); //$NON-NLS-1$
		answer.addElement(foreachElement);

		if (context.getPlugins()
				.sqlMapUpdateByPrimaryKeyWithoutBLOBsElementGenerated(answer,
						introspectedTable)) {
			parentElement.addElement(answer);
		}
	}
}
